This chapter is from the book

Configuring 802.11 Support—This section explains how to configure the data rates in the 2.4- and 5-GHz bands and support for 802.11n high throughput (HT) and 802.11ac very high throughput (VHT) functionality.

Understanding RRM—This section describes the algorithms that can monitor and adjust radio frequency parameters automatically in a wireless network.

This chapter covers the following exam topics:

2.2—Describe usable channel and power combination

2.2c—Describe RRM fundamentals

In Chapter 7, “Planning Coverage with Wireless APs,” you learned how to size access point (AP) cells appropriately by disabling data rates and changing the transmit power levels. You also learned how important a proper channel layout is to promote efficient roaming and minimize co-channel interference. You probably also realized how difficult these tasks are when you have to tune the radio frequency (RF) parameters manually across a large number of APs.

In this chapter, you learn about Cisco Radio Resource Management (RRM), a flexible and automatic mechanism that Cisco Wireless LAN controllers can use to make your life much easier.

“Do I Know This Already?” Quiz

The “Do I Know This Already?” quiz allows you to assess whether you should read this entire chapter thoroughly or jump to the “Exam Preparation Tasks” section. If you are in doubt about your answers to these questions or your own assessment of your knowledge of the topics, read the entire chapter. Table 13-1 lists the major headings in this chapter and their corresponding “Do I Know This Already?” quiz questions. You can find the answers in Appendix A, “Answers to the ‘Do I Know This Already?’ Quizzes.”

Table 13-1 “Do I Know This Already?” Section-to-Question Mapping

Foundation Topics Section

Questions

Configuring 802.11 Support

1-4

Understanding RRM

5-10

CAUTION

The goal of self-assessment is to gauge your mastery of the topics in this chapter. If you do not know the answer to a question or are only partially sure of the answer, you should mark that question as wrong for purposes of the self-assessment. Giving yourself credit for an answer you correctly guess skews your self-assessment results and might provide you with a false sense of security.

Which one of the following correctly describes a mandatory data rate?

A data rate that must be used by wireless clients all the time

The highest data rate used by an AP and its clients

A data rate that must be supported by a client before it can associate with an AP

A data rate required by the IEEE 802.11 standards body

You can configure only one data rate as mandatory on an AP. True or false?

True

False

An AP sends 802.11 broadcast management frames at which one of the following data rates?